2.05ct Topaz (Round, 7.92×7.92mm, Blue) vs 4.2ct Emerald (Cabochon, 12.59×8.39mm, Green)
Quick summary: When looked from above (face-up position), 4.2ct Emerald (12.59×8.39mm, cabochon cut) appears 76% larger than 2.05ct Topaz (7.92×7.92mm, round cut). See below how they compare side-by-side on a ring and finger.
| 2.05ct Topaz (round cut) |
vs
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4.2ct Emerald (cabochon cut) |
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blue |
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| 7.92×7.92 mm | 12.59×8.39 mm | |
| actual size | ||
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Actual size is set for screen
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Ring:
Skin tone:
Ring width: 3.0 mm
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64 mm |
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Actual sizes of
2.05ct Topaz Round (7.92×7.92mm, Blue)
and
4.2ct Emerald Cabochon (12.59×8.39mm, Green)
as they would appear on a ring and finger.
Adjust the ring and finger size to get an idea of how these gemstones would look on your finger.
Where to buy?
For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile
Face-up Size
All things being equal, Topaz will face-up smaller than Emerald for a given
carat weight, because it has higher specific gravity
(3.53 vs. 2.72 - this means it's "heavier" compared to Emerald of the same size). Face-up size also depends heavily on the proportions of the cut.
Face-up area is a measure of the size of the gem when viewed from above (as set in a ring). It tells you how big the gem is at the girdle plane.
Face-up area is a measure of the size of the gem when viewed from above (as set in a ring). It tells you how big the gem is at the girdle plane.
| 2.05 Ct Topaz (Round) | 4.2 Ct Emerald (Cabochon) | |
| 7.92×7.92 mm | vs | 12.59×8.39 mm |
| 49.27 mm² | 86.62 mm² |
| 2.05ct Topaz Round (7.92×7.92mm) | |
| 4.2ct Emerald Cabochon (12.59×8.39mm) | |
| Difference: 76% (37.35 mm²) |
4.2ct Emerald (Cabochon, 12.59×8.39mm) has approx. 76% more face-up area than 2.05ct Topaz (Round, 7.92×7.92mm).
Popular comparisons:
- 2.05ct Topaz (Round, Blue, 7.92 x 7.92) vs. 0.51ct Diamond (Round, White, 5.19 x 5.19)
- 2.05ct Topaz (Round, Blue, 7.92 x 7.92) vs. 3.65ct Sapphire (Oval, Blue, 11.64 x 7.76)
- 2.05ct Topaz (Round, Blue, 7.92 x 7.92) vs. 3.51ct Sapphire (Oval, Blue, 11.49 x 7.66)
- 2.05ct Topaz (Round, Blue, 7.92 x 7.92) vs. 0.95ct Sapphire (Oval, Blue, 7.44 x 4.96)
- 2.05ct Topaz (Round, Blue, 7.92 x 7.92) vs. 7.25ct Emerald (Cabochon, Green, 15.11 x 10.07)
- 2.05ct Topaz (Round, Blue, 7.92 x 7.92) vs. 0.6ct Emerald (Cabochon, Green, 6.59 x 4.39)
- 2.05ct Topaz (Round, Blue, 7.92 x 7.92) vs. 0.6ct Emerald (Oval, Green, 7.28 x 4.85)
- 2.05ct Topaz (Round, Blue, 7.92 x 7.92) vs. 0.07ct Sapphire (Emerald, Blue, 2.63 x 1.95)